Uploaded March 2025 | Updated September 2026, 2 weeks ago

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Overclock your vintage Mac with just SOFTWARE, even while its running!
⚠️Overclocking increases heat. Use a CPU heatsink and/or fan.
⚠️Have Spicy O'Clock? Remove it before using this software.
⚠️Phipli wants you to use his Control Strip instead of his CP & Extension. (I personally like to use both.)

🔎 *INDEX*
0:00 — Intro
4:11 — Using the Control Strip
8:48 — Impact on Gaming
14:57 — Using the Control Panel & Extension
25:06 — Benchmark Results
32:41 — Contemplating the Caveats
43:43 — Thoughts on Spicy O'Clock
46:04 — Closing Thoughts

🤝 *MAC COMPATIBILITY*
• LC475, P475, P476, Q605
• LC575, P577
👉Some Macs (not 575) need resistor changes. See "Phipli's Web Page" in the REFERENCE section below.

💾 *DOWNLOADS*
• Control Strip (Phipli recommends you use this): tinyurl.com/du4ubftp
(Compatible with both 32 & 24 bit addressing. Doesn't overclock boot sequence.)
• Control Panel & Extension: tinyurl.com/ytf9cbup
(Lots of manual control. Requires 32-bit Addressing. Overclocks boot sequence too.)
• Wish I Were (pretend to be another Mac): tinyurl.com/yc3se7fb
• My Benchmark Results: tinyurl.com/4ubmwmc9
• Basilisk II main app: tinyurl.com/2zevfnc9
• Basilisk II GUI app for settings: tinyurl.com/cf8ujxu5
• Q650 ROM (for Basilisk II): tinyurl.com/4nb84mr7
• 2GB Disk Image w/7.5.5 (for Basilisk II): tinyurl.com/59jk8srv
• Basilisk II Docs: tinyurl.com/bd4zwpbf
• Stuffit Expander 5.5: tinyurl.com/msuk3brm
• Doom II: tinyurl.com/6d59mdd8
• Dark Forces: tinyurl.com/4fz6n4cn

🏎️ *FOR HIGHER OVERCLOCKS*
• Use a 68040 with FPU (not an "LC" edition) ⚠️Watch out for fakes!
Eric Woo is a trustworthy seller: tinyurl.com/3ujd8m6k
• Recap your LC575 board with OS CON: youtu.be/IOX7wmnoy4U
• Recap your Analog Board too: tinyurl.com/yupzayc6
• Use Fast 60ns VRAM (512K SIMM): Kero's Mac Mods: tinyurl.com/42vzj5vj
Silicon Insider: tinyurl.com/y43fva3t
Drake/BetterBit: bit.ly/3LTNoa3

*ALUMINUM HEATSINKS (45x45x10mm)*
• Aluminum color: amzn.to/3XO50vf
• Black color: amzn.to/3FDxOAn
• Gold color: amzn.to/43Pyixl
• Thermal Tape (25mm wide): amzn.to/3DPBvT3
*OR*
• Clip for Heatsink only, by alxlab: bit.ly/3KoojCS

*FAN*
• Noctua 40x10mm Fan: amzn.to/3tNXzWy

*FAN MOUNTING SCREWS*
• Machine screws (bolts): amzn.to/3ua5gWV
• Nuts: amzn.to/3QVB4s1
Or use this to find substitutes:
• Metric Size: M3-0.5 (M3=shaft diameter, 0.5=thread pitch, see below)
• Head Diameter: 5.3mm (much wider won't fit in the fan screw holes)
• Shaft Length (excluding head): 15mm
• Shaft Diameter: 3mm
• Thread Pitch: 0.5mm
• Type: Stainless Steel

💵 _Your price on Amazon (US only) is the same even if you don't click the "amzn.to" Affiliate links above, but if you do click & purchase within 24 hours, Amazon may pay me a small commission._

🚀 MacSD: macsd.com

📚 *REFERENCE*
• Phipli's Web Page: tinyurl.com/k6hs5dr5
• Phipli's Github: github.com/Phipli/Soft-475-Overclock
• Mustermann's thread: tinyurl.com/mr3dty9n
• My thread on TinkerDifferent: tinyurl.com/46p42rhc
• LC475/Q605: Upgrading the MC88920 chip: tinyurl.com/mvz44hf8
• RAM & VRAM Speed Bottlenecks: bit.ly/4hqexAa
• LC475 & 575 cannot run System 6: tinyurl.com/484p5uzz
• My Clock Driver swap from DW55 to DW80: tinyurl.com/mp4dkxku

🙏 If you'd like THANK Phipli with a donation (yes, I donated), you can do that here:
elephantandchicken.co.uk/stuffandnonsense/?page_id=2832

🙇‍♂️ *SPECIAL THANKS* to Phipli & Mustermann for answering my many questions!

🙏 *THANK YOU, Paypal Supporters!* (since my last video)
• Brian Gorham 🇺🇸 (🥇TOP repeat supporter)
• Mark B Newlon 🇺🇸 (monthly supporter)
• Philippe Astier 🇫🇷 (monthly supporter)
• Mauro Acciaccaferri 🇮🇹 (monthly supporter)
• Gavin Maxwell 🇦🇺 (monthly supporter)

💰*HOW TO SUPPORT THIS CHANNEL*
paypal.me/supportJDW

📺 *Please SUBSCRIBE:*
youtube.com/c/JDW11/?sub_confirmation=1

🎬 *MY VIDEOS*
youtube.com/user/JDW26/videos

#475overclock #68040 #Performance #JDW1